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<!DOCTYPE html> <html> <head> <style> div { width: 200px; height: 200px; position:relative; will-change: transform; } #one { top:120px; background-color:blue; } #two { top: -200px; left: 100px; background-color:green; z-index: -1; } </style> </head> <body> <div id="one"></div> <div id="two"></div> </body> </html>